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1 April 1999

Line Shape and Profile of the LO Phonon Modes in Mixed Alloy System In1-x-yGaxAlyAs Epitaxial Layers Grown on InP

Gazi University, Faculty of Arts and Science, Department of Physics, 06500 Teknikokullar, Ankara, Turkey
Math. Comput. Appl.1999, 4(1), 83-89;https://doi.org/10.3390/mca4010083
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Abstract

In this work. linewidth variations versus compositions of the first-order longitudinal optic (LO) phonon modes in the mixed alloy system are studied. The asymmetry and broadening of the LO modes is explained using a “spatial correlation” model with a Gaussian correlation function. The system investigated here were In1-x-yGaxAlyAs quaternary alloys lattice-matched to InP(with x+y ≈47%). The quaternary alloy samples were grown as epilayers on (001) InP substrates by molecular beam epitaxy(MBE).

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